EP2702379B1 - Vorrichtung zur erfassung eines drucks, insbesondere eines brennraumdrucks einer brennkraftmaschine - Google Patents

Vorrichtung zur erfassung eines drucks, insbesondere eines brennraumdrucks einer brennkraftmaschine Download PDF

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Publication number
EP2702379B1
EP2702379B1 EP12708307.9A EP12708307A EP2702379B1 EP 2702379 B1 EP2702379 B1 EP 2702379B1 EP 12708307 A EP12708307 A EP 12708307A EP 2702379 B1 EP2702379 B1 EP 2702379B1
Authority
EP
European Patent Office
Prior art keywords
section
sensor
sensor module
supporting
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12708307.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2702379A1 (de
Inventor
Martin Gorzolka
Janpeter Wolff
Holger Scholzen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2702379A1 publication Critical patent/EP2702379A1/de
Application granted granted Critical
Publication of EP2702379B1 publication Critical patent/EP2702379B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/08—Testing internal-combustion engines by monitoring pressure in cylinders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
    • G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type

Definitions

  • the invention relates to a device for detecting a pressure, in particular a combustion chamber pressure of an internal combustion engine according to the features of claim 1.
  • the one embodiment describes a single device for detecting the combustion chamber pressure, in which a sensor module is arranged with a sensor element for pressure detection in a housing, wherein the pressure of the combustion chamber is transmitted via a membrane to the sensor element.
  • the further embodiment relates to an integrated solution of a sensor module with a sensor element for pressure detection, in which the sensor module is integrated in a glow plug, wherein the sensor module is coupled to a glow plug of the glow plug. The pressure of the combustion chamber is transmitted to the sensor element via the glow plug.
  • Object of the present invention is to make the sensor module so that the device for detecting the pressure is easier and more efficient to install.
  • a defined distance and a defined position for the connection lines is created on the preassembled sensor module. This makes the device easier and more efficient to install.
  • An expedient embodiment is provided when the portion perpendicular to the longitudinal extent of the sensor module has a larger cross section than the cross section of the sensor element and when the support surfaces are arranged on an outer surface of the portion.
  • connection lines in the radial arrangement to the position of the contact lugs of the sensor element can be achieved in a simple manner by the outer surface is formed by a cylindrical peripheral surface and by the support surfaces are formed on the cylindrical peripheral surface. Finally, it makes sense to carry out the section with a circular end face, with which the support element is supported on a housing-fixed fixing element.
  • the support element can be produced simply and advantageously when the support element has a conical transition section between the combustion chamber-side section and the connection-side section.
  • a good handling of the sensor module during assembly of the device is thereby possible when the sensor element and the support element is fixed and centered by means of a shrink tube, wherein the shrink tube additionally pushes the connection lines against the support surfaces, whereby a simple fixation of the connection lines is achieved on the sensor module.
  • the connecting cables are expediently designed as flat busbars.
  • the sensor module is biased between the compensation body and a fixing element by means of a biasing force.
  • the fixing element is connected by means of a sleeve-shaped connecting part fixed to the adapter element.
  • An additional guide in the axial direction outside the sensor module receive the connecting lines characterized in that the fixing element has recesses for the axial passage of the connecting lines.
  • the device for detecting the pressure in a combustion chamber of an internal combustion engine has at least one housing 10, in which a sensor module 12 is arranged, which is acted upon via a force path 14 with the pressure of the combustion chamber.
  • the sensor module 12 comprises a sensor element 20, on the combustion chamber side, a transmission element 21 and on the opposite side, a support element 22 is attached.
  • the sensor element 20, which is designed as a piezoelectric sensor, has a rectangular cross section, preferably a square cross section, at right angles to the axial extent of the sensor module 12 for production reasons.
  • the sensor element 20 has contact plates 38 which protrude with contact lugs 39.1 and 39.2 over the cross section of the sensor element 20.
  • the contact lugs 39.1, 39.2 are contacted with electrical connection lines 50.1 and 50.2, which are designed for example as flat busbars.
  • the connection lines 50.1 and 50.2 lead in the axial direction to connection contacts, not shown.
  • the force path 14 comprises a pressure transducer 16, a compensating body 25 for temperature compensation, an adapter element 26, a sleeve-shaped connecting part 27 and a fixing element 28.
  • the compensation body 25 is preferably rotationally symmetrical.
  • the adapter element 26 is designed with a first section part 31, a second section part 32 and a bending-elastic web 33 running substantially radially therebetween.
  • the adapter element 26 is fixedly connected to the second section part 32 on the housing 10.
  • the connection of the adapter element 26 to the housing 10 is effected by the second portion portion 32 is fixedly connected to the inner wall of the housing 10, for example by welding.
  • the adapter element 26 is furthermore connected to the pressure sensor 16 on the combustion chamber side on the first section part 31 and to the compensation body 25 on the side opposite thereto.
  • the first section part 31 is designed with a receptacle 35, on which the pressure sensor 16 is seated.
  • the first one points Section part 31 on a support 36 on which the compensation body 25 is supported.
  • the compensation module 25 is connected upstream of the sensor module 12 on the force path 14.
  • the compensation body 25 can be set up, for example, by a suitable choice of its length and / or its thermal expansion coefficient, so that the thermal expansions of the different transmission paths are at least largely identical, at least within typical temperature ranges to which the device can be exposed.
  • the pressure transducer 16 is at a in FIG. 1 shown stand-alone device for detecting the combustion chamber pressure with a diaphragm 18 in communication, which is exposed to the combustion chamber. This device is solely for detecting the combustion chamber pressure of an internal combustion engine. In a further, not shown embodiment, the pressure transducer 16 is formed for example by a glow tube of a glow plug, which is exposed to the combustion chamber of the internal combustion engine.
  • the sensor module 12 is inserted between the compensation body 25 and the fixing element 28 by means of a bias voltage.
  • Fixierelement furnished with the sensor module 12 by means of the support member 22, which is also made of ceramic material, from the fixing element 28.
  • components with the transmission element 21 and the support element 22 are at least at the contact surfaces with the sensor element 20 also perpendicular to the axial extent of the sensor module 12 executed with a polygonal cross-section, which substantially to the perpendicular to the axial extent of the sensor module 12 existing angular cross-section of the sensor element 20 is adjusted.
  • the sensor element 20 is executed quadrangular with a square cross-section.
  • the transmission element 21 is perpendicular to the axial extent of the sensor module 12 adapted to the cross section of the sensor element 20 also square with a square cross section.
  • the compensation body 25 is provided on a front side 39 facing the sensor module 12 with a circular recess 42 in which the transmission element 21 is received with an end face 44.
  • the four corners of the transmission element 21 according to FIGS. 3 and 4 provided with fillets 40 which lie on a common virtual rounding circle 41.
  • the diameter of the circular recess 42 is slightly larger than the diameter of the virtual rounding circle 41 on the transmission element 41. This creates a slight clearance between the rounding circle 41 and the circular recess 42, which for assembly reasons, the insertion of the transmission element 21 in the circular recess 42nd facilitated.
  • the transmission element 21 Due to the selected shape of the rounded portions 40, it is possible to center the transmission element 21 within the compensation body 25. As a result, the circular recess 42 of the compensation body 25 and the virtual rounding circle 41 of the transfer element 21 lie axially on a common center line.
  • the support element 22 has adjacent to the sensor element 20 on the sensor element side a cuboidal portion 51 which has perpendicular to the axial extent of the sensor module 12 to the cross section of the sensor element 20 adapted square cross-section.
  • the support element 22 has a fixing element-side section 52 with a cross-section that is larger than the cross section of the first section 51 perpendicular to the extension of the sensor module 20.
  • the fixing element-side section 52 is embodied cylindrically with a peripheral surface 56 and a circular end surface 54, the support element 22 being supported by the circular end surface 54 on the fixing element 28.
  • the transition between the sensor element-side section 51 and the fixing element-side section 52 is designed with a conical transition section 53.
  • the fixing element-side section 52 has two support surfaces 55.1 and 55.2, against which the two connection lines 50.1 and 50.2 abut.
  • the two support surfaces 55.1 and 55.2 are formed by two locations on the cylindrical peripheral surface 56.
  • the support surfaces 55.1, 55.2 form, at an axial distance from the contact lugs 39.1, 39.2 of the sensor element 20, a defined radial positional orientation for the connection lines 50.1, 50.2.
  • This defined radial position orientation by the support surfaces 55.1 and 55.2 is essentially predetermined by the radial position orientation of the contact lugs 39.1, 39.2.
  • the sensor module 12 is further surrounded by a shrink tube 46, with which the components of the sensor module 12 are fixed during the assembly process. After the shrinkage of the sensor module 12 with the shrink tubing 46 this takes over the fixation and thus the centering of the transmission element 21, the sensor element 20 and the support member 22 within the sensor module 12.
  • the shrink tubing 46 takes in addition to the fixation and centering of the components of the sensor module 12 additionally one Locking of the connection lines 50.1 and 50.2 on the support surfaces 55.1 and 55.2, by pressing the connection lines 50.1 and 50.2 to the cylindrical peripheral surface 56.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Measuring Fluid Pressure (AREA)
EP12708307.9A 2011-04-28 2012-03-08 Vorrichtung zur erfassung eines drucks, insbesondere eines brennraumdrucks einer brennkraftmaschine Not-in-force EP2702379B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011017667A DE102011017667A1 (de) 2011-04-28 2011-04-28 Vorrichtung zur Erfassung eines Drucks, insbesondere eines Brennraumdrucks einer Brennkraftmaschine
PCT/EP2012/054012 WO2012146430A1 (de) 2011-04-28 2012-03-08 Vorrichtung zur erfassung eines drucks, insbesondere eines brennraumdrucks einer brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP2702379A1 EP2702379A1 (de) 2014-03-05
EP2702379B1 true EP2702379B1 (de) 2018-02-14

Family

ID=45815542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12708307.9A Not-in-force EP2702379B1 (de) 2011-04-28 2012-03-08 Vorrichtung zur erfassung eines drucks, insbesondere eines brennraumdrucks einer brennkraftmaschine

Country Status (6)

Country Link
US (1) US9476796B2 (zh)
EP (1) EP2702379B1 (zh)
JP (1) JP5818970B2 (zh)
CN (1) CN103492848B (zh)
DE (1) DE102011017667A1 (zh)
WO (1) WO2012146430A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3035713B1 (fr) * 2015-04-29 2018-08-17 Continental Automotive France Capteur de mesure de la pression regnant dans un cylindre d'un vehicule automobile

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6378238A (ja) 1986-09-22 1988-04-08 Toshiba Corp 目的コ−ド生成装置
JPH0338675Y2 (zh) * 1986-11-10 1991-08-15
JPH03148028A (ja) * 1989-11-02 1991-06-24 Matsushita Electric Ind Co Ltd 圧電型圧力センサ
DE4009377A1 (de) * 1990-03-23 1991-10-02 Bosch Gmbh Robert Druckgeber zur druckerfassung im brennraum von brennkraftmaschinen
DE4103704A1 (de) * 1990-07-18 1992-01-23 Bosch Gmbh Robert Druckgeber zur druckerfassung im brennraum von brennkraftmaschinen
DE4103705A1 (de) * 1990-07-18 1992-01-23 Bosch Gmbh Robert Druckgeber zur druckerfassung im brennraum von brennkraftmaschinen
DE4103706A1 (de) * 1990-07-18 1992-01-30 Bosch Gmbh Robert Druckgeber zur druckerfassung im brennraum von brennkraftmaschinen
JPH04131722A (ja) * 1990-09-21 1992-05-06 Toyota Motor Corp 圧力センサ及び圧力センサの製造方法
US5606117A (en) * 1991-02-27 1997-02-25 Robert Bosch Gmbh Pressure sensor for measuring pressure in an internal combustion engine
JPH0694561A (ja) * 1992-09-11 1994-04-05 Matsushita Electric Ind Co Ltd 圧電型圧力センサ
JPH0719981A (ja) * 1993-06-01 1995-01-20 Nippondenso Co Ltd 高温用圧力センサ
US5521581A (en) * 1993-08-05 1996-05-28 Proulx; Raymond A. Fluid level and temperature monitor and alarm system for an automobile cooling system
DE19538854C1 (de) * 1995-10-19 1996-08-08 Bosch Gmbh Robert Druckgeber zur Druckerfassung im Brennraum von Brennkraftmaschinen
DE102004007202B4 (de) * 2003-02-17 2016-06-16 Denso Corporation Druckdetektor mit langgestrecktem Gehäuse zur Aufnahme eines druckempfindlichen Elementes
US6923068B2 (en) * 2003-06-19 2005-08-02 Dynisco, Inc. Pressure transducer
DE10343521A1 (de) * 2003-09-19 2005-04-21 Beru Ag Druckmessglühkerze für einen Dieselmotor
EP1856497B1 (de) * 2005-02-24 2014-08-20 Kistler Holding AG Bauteil für piezoelektrische kraft- oder drucksensoren, zusammengehalten von elektrisch isolierendem film
DE102005035062A1 (de) * 2005-07-27 2007-02-15 Robert Bosch Gmbh Vorrichtung zur Erfassung des Brennraumdrucks einer Brennkraftmaschine
DE102006008350A1 (de) 2006-02-21 2007-08-30 Robert Bosch Gmbh Druckmesseinrichtung
EP2283334A1 (de) * 2008-06-04 2011-02-16 Kistler Holding AG Drucksensor für messungen in einer kammer einer brennkraftmaschine
DE102009026436A1 (de) * 2009-05-25 2010-12-09 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Brennraumdrucks einer Brennkraftmaschine
DE102009022539A1 (de) * 2009-05-25 2010-12-02 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Brennraumdrucks einer Brennkraftmaschine
DE102010038798A1 (de) 2010-08-02 2012-02-02 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Brennraumdrucks
DE102011002596A1 (de) * 2011-01-12 2012-07-12 Robert Bosch Gmbh Brennraumdrucksensor zur Erfassung eines Drucks in einem Brennraum einer Verbrennungskraftmaschine
DE102011017647A1 (de) * 2011-04-28 2012-10-31 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Drucks, insbesondere eines Brennraumdrucks einer Brennkraftmaschine

Also Published As

Publication number Publication date
US20140174164A1 (en) 2014-06-26
JP2014512541A (ja) 2014-05-22
JP5818970B2 (ja) 2015-11-18
CN103492848A (zh) 2014-01-01
EP2702379A1 (de) 2014-03-05
US9476796B2 (en) 2016-10-25
CN103492848B (zh) 2015-11-25
DE102011017667A1 (de) 2012-10-31
WO2012146430A1 (de) 2012-11-01

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